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WO2003000503A1 - Motif de surface modifiable d'un point de vue optique - Google Patents

Motif de surface modifiable d'un point de vue optique Download PDF

Info

Publication number
WO2003000503A1
WO2003000503A1 PCT/EP2002/006149 EP0206149W WO03000503A1 WO 2003000503 A1 WO2003000503 A1 WO 2003000503A1 EP 0206149 W EP0206149 W EP 0206149W WO 03000503 A1 WO03000503 A1 WO 03000503A1
Authority
WO
WIPO (PCT)
Prior art keywords
surface pattern
representations
relief structures
structures
relief
Prior art date
Application number
PCT/EP2002/006149
Other languages
German (de)
English (en)
Inventor
Andreas Schilling
Wayne Robert Tompkin
René Staub
Original Assignee
Ovd Kinegram Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ovd Kinegram Ag filed Critical Ovd Kinegram Ag
Priority to EP02745360A priority Critical patent/EP1397259B1/fr
Priority to PL368914A priority patent/PL197612B1/pl
Priority to AT02745360T priority patent/ATE281313T1/de
Priority to JP2003506721A priority patent/JP4278049B2/ja
Priority to DE50201477T priority patent/DE50201477D1/de
Priority to KR10-2003-7016725A priority patent/KR20040022431A/ko
Priority to US10/480,909 priority patent/US6975438B2/en
Publication of WO2003000503A1 publication Critical patent/WO2003000503A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/902—Anti-photocopy

Definitions

  • the invention relates to an optically variable surface pattern of the type mentioned in the preamble of claim 1.
  • Such surface patterns contain structures, mostly in the form of microscopic relief structures that diffract incident light. These diffractive patterns are suitable, for example, as authenticity and security features to increase security against counterfeiting. They are particularly suitable for protecting securities, banknotes, means of payment, identity cards, passports, etc.
  • the function as an authenticity feature consists in informing the recipient of the object provided with it, e.g. a banknote to convey the feeling that the object is genuine and not a fake.
  • the function as a security feature is to prevent unauthorized copying or at least make it extremely difficult.
  • EP 0 105 099 B1, EP 0 330 738 B1, EP 0 375 833 B1 are representative of this. They are characterized by the brilliance of the patterns and the movement effect in the pattern, are embedded in a thin laminate made of plastic and are applied in the form of a brand to documents such as banknotes, securities, ID cards, passports, visas, identity cards etc., e.g. glued on , Materials which can be used to produce the security elements are compiled in EP 0 201 323 B1.
  • a pixel-oriented, optically variable surface pattern is known from European patent EP 0 375 833 B1. Such a surface pattern contains a predetermined number N of different images. The surface pattern is divided into pixels.
  • Each pixel is divided into N sub-pixels, each of the N sub-pixels of a pixel being assigned a pixel from one of the N images.
  • Each sub-pixel contains a diffraction structure in the form of a microscopic relief, which contains information about a color value, about a level of the brightness value and about a viewing direction.
  • a viewer of the surface pattern is always presented with a single image, the respective visible image being able to be changed by tilting or rotating the surface pattern or by changing the viewer's viewing angle.
  • the invention is based on the object of proposing an optically variable surface pattern which has improved copy protection.
  • a diffraction-optically effective surface pattern comprises at least two representations which are arranged nested on the surface pattern.
  • the representations contain light-diffractive, reflective structures which diffract incident light in different directions under normal lighting conditions, so that an observer can only see one of the representations at a time. By rotating and / or tilting the surface pattern or by changing the viewing angle, the viewer can make one or the other representation a visible representation.
  • the invention is now based on the idea of making the differences in the diffraction directions so small that the representations can be perceived separately by the viewer from a typical distance of 30 cm on the one hand, and that on the other hand when copying using a color copier either all representations are copied so that an image is created on the copy that corresponds to the overlay of all representations, or that none of the representations is copied.
  • Symmetrical or asymmetrical sawtooth-shaped relief structures are preferably used as diffraction structures, which have a relatively long period length but different inclination angles compared to the wavelength of visible light.
  • the period length can be the same for the relief structures of all representations; but it can also be of different sizes.
  • the period length L is typically 5 ⁇ m or more. The longer the period, the more the relief structure looks like an inclined mirror, at which the incident light is reflected and hardly diffracted. That the relief structure bends the light increasingly achromatically and the angle of diffraction is determined by the law of reflection and diffraction and is at least twice the angle of inclination for perpendicularly incident light.
  • Achromatic diffraction gratings with a period length L of more than 5 ⁇ m and a sinusoidal relief profile, for example a sinusoidal relief profile, can also be used as diffraction structures.
  • the relief structures of the Different representations differ in the period length L and / or in the structure depth of the relief profile, so that the representations can be perceived separately by the observer.
  • the diffraction structures can also be implemented in the form of a volume hologram.
  • the surface pattern according to the invention can thus be characterized in that the different representations when illuminated with light perpendicular to the surface pattern can be perceived separately by a human viewer from different viewing angles, and that the difference in the viewing angles of at least two of the representations is so small that one copy produced by means of a copier which reproduces at least two representations one above the other.
  • the diffraction directions depend on the orientation of the surface pattern. So that all representations are copied onto the copy, regardless of the orientation of the surface pattern, when copying by means of a color copier, there can be several representations of the same content per representation, which are formed by linear, but rotated lattice structures. Another solution is to use circular grids as the grid.
  • Fig. 1 shows the structure of a pixel-oriented surface pattern in the
  • Fig. 8 is a relief structure with a symmetrical profile shape
  • the image motifs are referred to below as graphic representations 2, 3 and 4 (FIG. 2).
  • the surface pattern 1 is divided into n * m pixels or fields 5 in a matrix.
  • the entirety of the partial areas 6 includes the first graphic representation 2, the totality of the partial areas 7 contains the second graphic representation 3 and the totality of the partial areas 8 contains the third graphic representation 4.
  • the dimensions of a field 5 are typically less than
  • FIG. 2 shows the three representations 2, 3 and 4, which represent, for example, the lettering "100", “EUR” and " € € €".
  • the lettering is light on a dark background (the reverse is true in the drawing).
  • the representations 2, 3 and 4 are also divided into n * m grid fields 2.1, 3.1 and 4.1, which are either light or dark.
  • the grid fields are for drawing reasons 2.1, 3.1, 4.1 much too large compared to the lettering and only some of the grid fields 2.1, 3.1, 4.1 are shown.
  • a partial surface 6 (FIG. 1) is assigned to each grid field 2.1 of the first representation 2.
  • a partial area 7 (FIG. 1) is assigned to each grid area 3.1 of the second representation 3
  • a partial area 8 (FIG. 1) is assigned to each grid area 4.1 of the third representation 4.
  • the assigned partial area 6 contains a mirror or a cross grating with at least 3000 lines per millimeter, as a result of which the incident light is reflected, absorbed or scattered at high angles. If one of the grid fields 2.1 is bright, the assigned partial surface 6, as shown in FIG. 3, contains a sawtooth
  • the relief structure 9.1 has a comparatively large period length L in comparison to the wavelength of visible light, which is typically 5 ⁇ m or more.
  • the first representation 2 (FIG. 2) thus appears when illuminated with white light, and when the viewer assumes his viewing angle in accordance with the reflection conditions of the geometric optics, as an image composed of light and dark dots, which are usually the color of the relief structure 9.1 used reflective layer 11 and / or the cover layer 12.
  • the two other representations 3 (FIG. 2) and 4 (FIG. 2) are realized with a sawtooth-shaped relief structure 9.2 and 9.3, respectively, similar to the relief structure 9.1 of the first representation 2.
  • the angles of inclination ⁇ , ⁇ and y of the sawtooth of the three relief structures 9.1, 9.2 and 9.3 with respect to the plane of the surface pattern 1 are selected such that
  • the furrows of the different relief structures 9.1, 9.2 and 9.3 run approximately parallel, i.e. the maximum difference in the angles that the furrows make with respect to any axis in the plane of the surface pattern 1, the so-called azimuth angle, should be less than approximately 10 °, so that under the lighting conditions prevailing during copying, either all three or none of the representations 2, 3 and 4 are transferred to the copy.
  • the furrows preferably run parallel to a side edge of the object to be protected with the surface pattern, so that the furrows are aligned as parallel as possible to the scanner of a color copier.
  • the surface pattern 1 is advantageously designed as a layered composite.
  • the layer composite is formed by a first lacquer layer 10, a reflection layer 11 and a second lacquer layer, the cover layer 12.
  • the lacquer layer 10 is advantageously an adhesive layer, so that the layer composite can be glued directly onto a substrate.
  • substrate means, for example, a security, a banknote, an identity card, a credit card, a passport or, quite generally, an object to be protected.
  • the cover layer 12 advantageously covers the relief structures completely. It also preferably has an optical one in the visible range
  • the cover layer 12 also serves as a scratch-resistant protective layer.
  • FIG. 3 shows side by side the sawtooth-shaped relief structures 9.1, 9.2 and 9.3 associated with the bright pixels of the three representations 2, 3 and 4 of FIG. 2, which are present in the corresponding partial areas 6, 7 and 8 of the fields 5.
  • the pupil diameter of 5 mm perceives the representations 2, 3 and 4 separately if the difference in the angle of inclination between two neighboring representations is approximately 0.5 ° - 5 °.
  • the value for the largest angle of inclination ie here for the angle of inclination y, should be at most 25 ° so that on the one hand the relief structures 9 do not become too deep and on the other hand all three representations 2, 3 and 4 are copied onto the copy when copied by means of a copier ,
  • Fig. 4 shows schematically the geometric conditions when copying by means of a color copier 13.
  • the color copier 13 has a glass plate 14 on which the document 15 to be copied, e.g. a bank note, and a carriage 16 which can be moved in the x direction and which contains a light source 17, a deflecting mirror 18 and a detector 19 with photosensors 20.
  • the light 21 emitted by the light source 17 falls obliquely onto the document 15 at a certain angle and thus obliquely onto the surface pattern 1 with the differently inclined relief structures 9.1, 9.2 and 9.3 (FIG. 3).
  • Part of the incident light is reflected approximately perpendicular to the glass plate 14, strikes the deflecting mirror 18 and is thus imaged on the photosensors 20 of the color copier 13.
  • the angles of inclination ⁇ , ⁇ and y are chosen such that the relief structures 9.1, 9.2 and 9.3, when properly oriented on the glass plate 14 of the color copier 13, reflect the light emitted by the light source 17 onto the deflecting mirror 18. 5 shows this situation.
  • Each of the representations 2, 3 and 4 shows an associated partial surface 6, 7 and 8, respectively, on a very greatly enlarged scale, a light point of the representation being assigned to these partial surfaces.
  • the light beam reflected on the relief structure 9.1 is identified by the reference symbol 22, the light beam reflected on the relief structure 9.2 is identified by the reference symbol 23, and the light beam reflected on the relief structure 9.3 is identified by the reference symbol 24.
  • the mean angle of inclination is also adapted to the typical angle of 30 ° at 15 °, at which the light 21 emitted by the light source 17 of the color copier 13 falls on the document to be copied. This means that the light diffracted at the associated relief structure is then bent approximately vertically downward towards the deflecting mirror 18.
  • the surface of the document receiving the surface pattern 1 must have a relatively smooth surface, since otherwise the representations are smeared because of the roughness so that they do not are visible separately.
  • the difference between the largest and the smallest inclination angle should be at most 20 ° so that all representations are copied during copying.
  • the differences between successive angles of inclination that is to say the difference ⁇ - ⁇ and the difference ⁇ - ⁇ , were the same.
  • the differences between successive angles of inclination can also be of different sizes.
  • the relief structures 9.1, 9.2 and 9.3 are advantageously non-linear grids with straight lines
  • Furrows but grids with serpentine corrugated furrows, i.e. grids with furrows with alternating curvature, or grids with circular or polygonal furrows approximating the circle.
  • a relief structure with circular furrows is shown in FIG. 7. The distance between two circular lines corresponds to the period length L.
  • asymmetrical relief structures 9.1, 9.2, 9.3 relief structures with a symmetrical profile shape can also be used, which essentially do not reflect incident light in one direction, but in two directions. Such an example is shown in FIG. 8.
  • angle ⁇ which denotes the inclination of the relief structures 9 with respect to the horizontal.
  • FIG. 9 shows a section of an example of a non-pixel-oriented surface pattern with two representations 2 and 3 that do not overlap.
  • the surface occupied by the surface pattern 1 is divided into three partial surfaces 6, 7 and 26.
  • the partial surface 26 serves as a common background for the two representations 2 and 3.
  • the partial surface 6 contains sawtooth-shaped ones Relief structures that have a first angle of inclination and that generate the bright points of the first representation 2.
  • the partial surface 7 contains sawtooth-shaped relief structures which have a second angle of inclination which is different from the first angle of inclination and which generate the bright points of the second representation 3.
  • the partial surface 26 serves to create a dark or inconspicuous background. It is designed, for example, as a mirror or as a cross grating with at least 3000 lines per millimeter or transparent, so that the substrate to which the surface pattern is glued is visible at this point.
  • the two representations 2 and 3 can thus be perceived separately by a human viewer with a given direction of illumination, because they are visible from different angles.
  • the angles of inclination of the sawtooth-shaped relief structures are chosen so small that when copying by means of a copier, both representations 2 and 3 are reproduced on the copy.
  • the two representations 2 and 3 are therefore visible on the copy without the viewer having to change the viewing angle or the direction of illumination.
  • the invention can be implemented either according to the first exemplary embodiment as a pixel-oriented surface pattern, or according to the above exemplary embodiment as a non-pixel-oriented surface pattern, the overlapping regions then being assigned to either the first or the second representation.
  • the surface pattern can also be realized as a combination of the two exemplary embodiments, the overlapping regions being designed as in the pixel-oriented surface pattern.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)
  • Printing Methods (AREA)
  • Prostheses (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

La présente invention concerne un motif de surface modifiable d'un point de vue optique (1) comprenant des structures en relief (9.1;9.2;9.3) destinées à produire au moins deux représentations (2;3;4). Les structures en relief (9.1;9.2;9.3) présentent une longueur de période (L) d'au moins cinq micromètres et ont une forme en dents de scie. Les structures en relief (9.1;9.2;9.3) associées à différentes représentations (2;3;4) ont différents angles d'inclinaison (α; β; η). Les angles d'inclinaison sont choisis de sorte que les représentations (2;3;4) peuvent d'une part être observées séparément par un observateur et sont d'autres part transmises grâce à la production d'une copie au moyen d'un photocopieur couleur, toutes sur ladite copie.
PCT/EP2002/006149 2001-06-20 2002-06-05 Motif de surface modifiable d'un point de vue optique WO2003000503A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP02745360A EP1397259B1 (fr) 2001-06-20 2002-06-05 Motif de surface modifiable d'un point de vue optique
PL368914A PL197612B1 (pl) 2001-06-20 2002-06-05 Zmienny optycznie wzór powierzchniowy
AT02745360T ATE281313T1 (de) 2001-06-20 2002-06-05 Optisch variables flächenmuster
JP2003506721A JP4278049B2 (ja) 2001-06-20 2002-06-05 光学的に変化し得る表面模様
DE50201477T DE50201477D1 (de) 2001-06-20 2002-06-05 Optisch variables flächenmuster
KR10-2003-7016725A KR20040022431A (ko) 2001-06-20 2002-06-05 광학적 가변 표면 패턴
US10/480,909 US6975438B2 (en) 2001-06-20 2002-06-05 Optically variable surface pattern

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10129939A DE10129939B4 (de) 2001-06-20 2001-06-20 Optisch variables Flächenmuster
DE10129939.7 2001-06-20

Publications (1)

Publication Number Publication Date
WO2003000503A1 true WO2003000503A1 (fr) 2003-01-03

Family

ID=7688955

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/006149 WO2003000503A1 (fr) 2001-06-20 2002-06-05 Motif de surface modifiable d'un point de vue optique

Country Status (13)

Country Link
US (1) US6975438B2 (fr)
EP (1) EP1397259B1 (fr)
JP (1) JP4278049B2 (fr)
KR (1) KR20040022431A (fr)
CN (1) CN100343076C (fr)
AT (1) ATE281313T1 (fr)
CZ (1) CZ304910B6 (fr)
DE (2) DE10129939B4 (fr)
ES (1) ES2229159T3 (fr)
PL (1) PL197612B1 (fr)
RU (1) RU2284918C2 (fr)
TW (1) TWI230325B (fr)
WO (1) WO2003000503A1 (fr)

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WO2009083150A2 (fr) * 2007-12-27 2009-07-09 Giesecke & Devrient Gmbh Signe de sécurité pour angles d'inclinaison élevés
US10051977B2 (en) 2004-02-03 2018-08-21 Rtc Industries, Inc. Product securement and management system
US10525759B2 (en) 2005-12-21 2020-01-07 Giesecke+Devrient Currency Technology Gmbh.. Visually variable security element and method for production thereof

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JP4608769B2 (ja) * 2000-12-05 2011-01-12 凸版印刷株式会社 ホログラム・チェック用プレート
DE10221491A1 (de) * 2002-05-14 2003-12-04 Kurz Leonhard Fa Optisch variables Flächenmuster
DE10328759B4 (de) * 2003-06-25 2006-11-30 Ovd Kinegram Ag Optisches Sicherheitselement und System zur Visualisierung von versteckten Informationen
DE102005027380B4 (de) 2005-06-14 2009-04-30 Ovd Kinegram Ag Sicherheitsdokument
DE102006016139A1 (de) 2006-04-06 2007-10-18 Ovd Kinegram Ag Mehrschichtkörper mit Volumen-Hologramm
DE102006037431A1 (de) * 2006-08-09 2008-04-17 Ovd Kinegram Ag Verfahren zur Herstellung eines Mehrschichtkörpers sowie Mehrschichtkörper
DE112007002427B4 (de) * 2006-10-12 2017-11-02 Ccl Secure Pty Ltd Sicherheitsdokument mit Mikroprismen
WO2009018287A1 (fr) 2007-07-31 2009-02-05 Qualcomm Mems Technologies, Inc. Dispositifs pour accentuer la variation de couleur des modulateurs interférométriques
US20100177390A1 (en) * 2008-12-03 2010-07-15 Robert Hutchins Wavelength dependent optical elements and applications thereof
DE102009056934A1 (de) 2009-12-04 2011-06-09 Giesecke & Devrient Gmbh Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes
DE102010047250A1 (de) 2009-12-04 2011-06-09 Giesecke & Devrient Gmbh Sicherheitselement, Wertdokument mit einem solchen Sicherheitselement sowie Herstellungsverfahren eines Sicherheitselementes
FR2953965B1 (fr) 2009-12-14 2011-11-25 Arjowiggins Security Element de securite comportant une structure optique
DE102010048262A1 (de) 2010-10-12 2012-04-12 Giesecke & Devrient Gmbh Darstellungselement
DE102010049600A1 (de) 2010-10-26 2012-01-19 Giesecke & Devrient Gmbh Sicherheitselement mit optisch variablem Flächenmuster
DE102010049617A1 (de) 2010-10-26 2012-04-26 Giesecke & Devrient Gmbh Sicherheitselement mit optisch variablem Flächenmuster
DE102010049832A1 (de) * 2010-10-27 2012-05-03 Giesecke & Devrient Gmbh Optisch variables Flächenmuster
DE102010049831A1 (de) * 2010-10-27 2012-05-03 Giesecke & Devrient Gmbh Optisch variables Flächenmuster
WO2012146257A1 (fr) 2011-04-29 2012-11-01 Danmarks Tekniske Universitet Codage en phase dans des dispositifs anti-contrefaçon à microréseau
DE102011108242A1 (de) 2011-07-21 2013-01-24 Giesecke & Devrient Gmbh Optisch variables Element, insbesondere Sicherheitselement
US9658595B2 (en) * 2012-08-23 2017-05-23 Covestro Deutschland Ag Security document and/or document of value containing a visually changeable window with a hologram
DE102012020257A1 (de) * 2012-10-16 2014-04-17 Giesecke & Devrient Gmbh Optisch variables Flächenmuster
DE102013002137A1 (de) * 2013-02-07 2014-08-07 Giesecke & Devrient Gmbh Optisch variables Flächenmuster
JP6506737B2 (ja) * 2013-04-19 2019-04-24 ネステク ソシエテ アノニム 成形食品
CN104210273B (zh) * 2014-08-13 2017-01-25 中钞特种防伪科技有限公司 一种体积反射全息防伪元件及有价物品
CN105894950A (zh) * 2014-11-28 2016-08-24 王杰芳 一种具有三维浮雕效果的防伪薄膜结构
JP7156032B2 (ja) * 2016-11-28 2022-10-19 凸版印刷株式会社 表示体、およびその真贋判定方法、ならびに印刷物
JP6662333B2 (ja) * 2017-03-14 2020-03-11 オムロン株式会社 表示装置
DE102018004088A1 (de) * 2018-05-18 2019-11-21 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit Mikroreflektoren
CN112572015B (zh) * 2019-09-30 2023-06-06 中钞特种防伪科技有限公司 光学防伪元件及防伪产品

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EP0375833A1 (fr) * 1988-12-12 1990-07-04 Landis & Gyr Technology Innovation AG Modèle horizontal optiquement variable
EP0375833B1 (fr) 1988-12-12 1993-02-10 Landis & Gyr Technology Innovation AG Modèle horizontal optiquement variable
DE4243905A1 (de) * 1992-12-23 1994-06-30 Gao Ges Automation Org Sicherheitselement zum Schutz von Sicherheitsdokumenten gegen Reproduktion
US6157487A (en) 1995-11-28 2000-12-05 Ovd Kinegram Ag Optically variable surface pattern

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10051977B2 (en) 2004-02-03 2018-08-21 Rtc Industries, Inc. Product securement and management system
US10525759B2 (en) 2005-12-21 2020-01-07 Giesecke+Devrient Currency Technology Gmbh.. Visually variable security element and method for production thereof
WO2009083150A2 (fr) * 2007-12-27 2009-07-09 Giesecke & Devrient Gmbh Signe de sécurité pour angles d'inclinaison élevés
WO2009083150A3 (fr) * 2007-12-27 2009-11-12 Giesecke & Devrient Gmbh Signe de sécurité pour angles d'inclinaison élevés

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CZ200496A3 (cs) 2004-07-14
EP1397259B1 (fr) 2004-11-03
PL368914A1 (en) 2005-04-04
DE10129939B4 (de) 2006-06-22
CN100343076C (zh) 2007-10-17
DE50201477D1 (de) 2004-12-09
DE10129939A1 (de) 2003-01-16
PL197612B1 (pl) 2008-04-30
EP1397259A1 (fr) 2004-03-17
CZ304910B6 (cs) 2015-01-14
RU2284918C2 (ru) 2006-10-10
ES2229159T3 (es) 2005-04-16
US6975438B2 (en) 2005-12-13
US20050068624A1 (en) 2005-03-31
JP4278049B2 (ja) 2009-06-10
TWI230325B (en) 2005-04-01
KR20040022431A (ko) 2004-03-12
CN1538913A (zh) 2004-10-20
ATE281313T1 (de) 2004-11-15
RU2004101286A (ru) 2005-02-10
JP2004530935A (ja) 2004-10-07

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